What Is a Page Fault?

Page fault: An interruption that occurs when software attempts to read or write a virtual memory location marked as "not present". Page faults record the number of times a process must recover from a hard disk.

1xx-information. These status codes indicate a temporary response. The client should be prepared to receive one or more 1xx responses before receiving a regular response.

100-continued.

101-Switch protocol.

2xx- success. This type of status code indicates that the server successfully accepted the client request.

200-OK. The client request was successful.

201-Created.

202-Accepted.

203-Non-authoritative information.

204-No content.

205-Reset content.

206-Partial content.

3xx-redirect. The client browser must take more action to fulfill the request. For example, the browser may have to request a different page on the server or repeat the request through a proxy server.

301-The object has been permanently removed, ie it is permanently redirected.

302-The object has been temporarily moved.

304-Not modified.

307-Temporary redirect.

4xx-client error

An error occurred and the client appears to be having problems. For example, the client requests a page that does not exist, and the client did not provide valid authentication information. 400-Bad request.

401-Access is denied. IIS defines many different 401 errors, which indicate more specific error causes. These specific error codes are displayed in the browser, but not in the IIS logs:

401.1-Login failed.

401.2- ^[2] Login configuration failed due to server configuration.

401.3-Unauthorized due to ACL restrictions on resources.

401.4-Filter authorization failed.

401.5-ISAPI / CGI application authorization failed.

401.7-Access is denied by a URL authorization policy on the web server. This error code is specific to IIS 6.0.

403-Forbidden: IIS defines many different 403 errors, which indicate more specific reasons for the error:

403.1-Executive access is forbidden.

403.2-Read access is forbidden.

403.3-Write access is forbidden.

403.4-SSL is required.

403.5-Requires SSL128.

403.6-The IP address was rejected.

403.7-Client certificate required.

403.8-Site access is denied.

403.9-Too many users.

403.10-The configuration is invalid.

403.11-Password change.

403.12-Access denied mapping table.

403.13-The client certificate is revoked.

403.14-Reject directory listing.

403.15-Exceeded client access permissions.

403.16-The client certificate is untrusted or invalid.

403.17-The client certificate has expired or is not yet valid.

403.18-The requested URL cannot be executed in the current application pool. This error code is specific to IIS 6.0.

403.19-CGI cannot be performed for clients in this application pool. This error code is specific to IIS 6.0.

403.20-Passport login failed. This error code is specific to IIS 6.0.

404-Not found.

404.0- (none)-No files or directories were found.

404.1-Cannot access the Web site on the requested port.

404.2-Web service extension locking policy prevents this request.

404.3-MIME mapping policy blocks this request.

405-The HTTP predicate used to access this page is not allowed (method is not allowed)

406-The client browser does not accept the MIME type of the requested page.

407-Proxy authentication required.

412-Prerequisite failed.

413-The requesting entity is too large.

414-The request URI is too long.

415Unsupported media type.

416-The requested range cannot be met.

417-Execution failed.

423Locked error.

5xx- server error. The server was unable to complete the request because it encountered an error.

500-Internal server error.

500.12-The application is busy restarting on the web server.

500.13-Web server is too busy.

500.15-Direct requests to Global.asa are not allowed.

500.16UNC authorization credentials are incorrect. This error code is specific to IIS 6.0.

500.18-URL authorization store cannot be opened. This error code is specific to IIS 6.0.

500.100-Internal ASP error.

501-Header value specifies unimplemented configuration.

502-The web server received an invalid response when it was used as a gateway or proxy server.

502.1-CGI application timed out.

502.2-CGI application error. application.

503-Service is unavailable. This error code is specific to IIS 6.0.

504-Gateway timeout.

505-HTTP version is not supported.